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参数资料
| 型号： | TPS3305-18QDRQ1 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8 |
| 封装： | PLASTIC, SO-8 |
| 文件页数： | 9/16页 |
| 文件大小： | 458K |
| 代理商： | TPS3305-18QDRQ1 |
TPS330615Q1, TPS330618Q1, TPS330620Q1, TPS330625Q1, TPS330633Q1
DUAL PROCESSOR SUPERVISORY CIRCUITS WITH POWERFAIL
SGLS241 MARCH 2004
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description (continued)
The various supervisory circuits are designed to monitor the nominal supply voltage, as shown in the following
supply voltage monitoring table.
SUPPLY VOLTAGE MONITORING
DEVICE
NOMINAL SUPERVISED VOLTAGE
THRESHOLD VOLTAGE (TYP)
DEVICE
SENSE1
SENSE2
SENSE1
SENSE2
TPS3306-15
3.3 V
1.5 V
2.93 V
1.4 V
TPS3306-18
3.3 V
1.8 V
2.93 V
1.68 V
TPS3306-20
3.3 V
2 V
2.93 V
1.85 V
TPS3306-25
3.3 V
2.5 V
2.93 V
2.25 V
TPS3306-33
5 V
3.3 V
4.55 V
2.93 V
During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the
supervisory circuits monitor the SENSEn inputs and keep RESET active as long as SENSEn remains below
the threshold voltage VIT.
An internal timer delays the return of the RESET output to the inactive state (high) to ensure proper system reset.
The delay time, td(typ) = 100 ms, starts after SENSE1 and SENSE2 inputs have risen above the threshold
voltage VIT. When the voltage at SENSE1 or SENSE2 input drops below the threshold voltage VIT, the output
becomes active (low) again.
The integrated power-fail (PFI) comparator with separate open-drain (PFO) output can be used for low-battery
detection, power-fail warning, or for monitoring a power supply other than the main supply.
The TPS3306-xx devices integrate a watchdog timer that is periodically triggered by a positive or negative
transition of WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval,
tt(out) = 0.50 s, RESET becomes active for the time period td . This event also reinitializes the watchdog timer.
Leaving WDI unconnected disables the watchdog.
The TPS3306-xx devices are available in standard 8-pin SO packages.
The TPS3306-xxQ family is characterized for operation over a temperature range of 40
°C to 125°C.
AVAILABLE OPTIONS
TA
PACKAGED DEVICES
TOP-SIDE
TA
SMALL OUTLINE (D)
TOP-SIDE
MARKING
Tape and Reel
TPS3305-15QDRQ1
615Q1
Tape and Reel
TPS3305-18QDRQ1
618Q1
40
_C to 125_C
Tape and Reel
TPS3305-20QDRQ1
620Q1
40 C to 125 C
Tape and Reel
TPS3305-25QDRQ1
625Q1
Tape and Reel
TPS3305-33QDRQ1
633Q1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS3305-25 | 制造商:TI 制造商全称:Texas Instruments 功能描述:双处理器监事 |
| TPS3305-25D | 功能描述:监控电路 Dual Processor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| TPS3305-25DG4 | 功能描述:监控电路 Dual Processor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| TPS3305-25DGN | 功能描述:监控电路 Dual Processor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| TPS3305-25DGNG4 | 功能描述:监控电路 Dual Processor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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